Depending on the scheduling you could be waiting a couple of hours beforehand and probably an hour or so after.
Take a dressing gown, slippers (as they’ll probably get you into a gown ASAP), comfy clothes to travel home in. I took a book and a magazine but I didn’t have enough attention span for the book really so just flicked through the mag!
I found the time there quite busy - you will be visited by the nurses, anaesthetists, doctors and possibly embryologists pre procedure and everyone explained everything clearly and gave me the chance to ask questions. I was particularly nervous about the sedation but they reassured me.
I was told the scheduling for the morning and when it was my slot I was asked to use the loo and then walked down to the theatre. I was then in a small anaesthetic room to start with where they gave me some initial sedation and painkiller which really chilled me out, and then wheeled me into the theatre where it was set up basically like a larger scanning room. Everyone said hello and then that was the last I remember until I woke up! I looked at the clock and about 30 mins had gone by. I was tired and anxious to find out if they’d got any eggs (they got 15 in the end...not many of those developed but that’s another story).
It wasn’t long before I was back in my cubicle and DH could re-join me. They gave me a sandwich and a tea and it wasn’t long before the Drs visited again. We were updated on egg collection and next steps, and then they removed the IV and I was allowed to get dressed and go home.
Good luck with your procedure, hope it goes well 